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Duan J, Wen P, Zhao Y, van de Leemput J, Lai Yee J, Fermin D, Warady BA, Furth SL, Ng DK, Sampson MG, Han Z. A Drosophila model to screen Alport syndrome COL4A5 variants for their functional pathogenicity. bioRxiv 2024:2024.03.06.583697. [PMID: 38559272 PMCID: PMC10979928 DOI: 10.1101/2024.03.06.583697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Alport syndrome is a hereditary chronic kidney disease, attributed to rare pathogenic variants in either of three collagen genes (COL4A3/4/5) with most localized in COL4A5. Trimeric type IV Collagen α3α4α5 is essential for the glomerular basement membrane that forms the kidney filtration barrier. A means to functionally assess the many candidate variants and determine pathogenicity is urgently needed. We used Drosophila, an established model for kidney disease, and identify Col4a1 as the functional homolog of human COL4A5 in the fly nephrocyte (equivalent of human podocyte). Fly nephrocytes deficient for Col4a1 showed an irregular and thickened basement membrane and significantly reduced nephrocyte filtration function. This phenotype was restored by expressing human reference (wildtype) COL4A5, but not by COL4A5 carrying any of three established pathogenic patient-derived variants. We then screened seven additional patient COL4A5 variants; their ClinVar classification was either likely pathogenic or of uncertain significance. The findings support pathogenicity for four of these variants; the three others were found benign. Thus, demonstrating the effectiveness of this Drosophila in vivo kidney platform in providing the urgently needed variant-level functional validation.
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Affiliation(s)
- Jianli Duan
- Center for Precision Disease Modeling, Department of Medicine, University of Maryland School of Medicine, MD 21201, USA
- Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, MD 21201, USA
| | - Pei Wen
- Center for Precision Disease Modeling, Department of Medicine, University of Maryland School of Medicine, MD 21201, USA
| | - Yunpo Zhao
- Center for Precision Disease Modeling, Department of Medicine, University of Maryland School of Medicine, MD 21201, USA
- Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, MD 21201, USA
| | - Joyce van de Leemput
- Center for Precision Disease Modeling, Department of Medicine, University of Maryland School of Medicine, MD 21201, USA
- Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, MD 21201, USA
| | - Jennifer Lai Yee
- Division of Nephrology, Department of Pediatric, University of Michigan School of Medicine, Ann Arbor, MI 48105, USA
| | - Damian Fermin
- Division of Nephrology, Department of Internal Medicine, University of Michigan School of Medicine, Ann Arbor, MI 48105, USA
| | - Bradley A Warady
- Division of Pediatric Nephrology, Children’s Mercy Kansas City, Kansas City, MO 64108, USA
| | - Susan L Furth
- Children’s Hospital of Philadelphia, Philadelphia, PA 19104, USA
- Division of Nephrology, Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Derek K Ng
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, MD 21205, USA
| | - Matthew G Sampson
- Division of Nephrology, Department of Pediatrics, Boston Children’s Hospital, Boston, MA 02115, USA
- Harvard Medical School Boston, MA 02115, USA
- Kidney Disease Initiative, Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - Zhe Han
- Center for Precision Disease Modeling, Department of Medicine, University of Maryland School of Medicine, MD 21201, USA
- Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, MD 21201, USA
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Leung DYL, Lee CT, Chu SYJ, Ng F, Wen P, Fan J, Cheung DSK, Seto Nielsen L, Guruge S, Wong J. Chinese family care partners of older adults in Canada have grit: A qualitative study. J Adv Nurs 2024; 80:1018-1029. [PMID: 37828729 DOI: 10.1111/jan.15878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 08/03/2023] [Accepted: 09/11/2023] [Indexed: 10/14/2023]
Abstract
AIM To explain the process taken by Chinese family care partners of older adults in the Greater Toronto Area, Canada, to access health and social services in their communities. The research question was: What mechanisms and structures impact the agency of Chinese family care partners of older adults, in the process of assisting them to access health and social services? DESIGN This qualitative study was informed by critical realism. METHODS Chinese family care partners of older adults in the Greater Toronto Area, Canada, were interviewed from August 2020 to June 2021. Transcripts underwent thematic analysis. FINDINGS Twenty-eight Chinese family care partners expressed a firm commitment to maintain caregiving conditions and to judiciously access health and social services. Their commitment was made up of three parts: (a) legislative and cultural norms of family, work, and society; (b) their perseverance to fill gaps with limited social and financial resources; (c) the quality of their relationship to, and illness trajectory of the older adults. The social structures created tension in how Chinese family care partners made decisions, negotiated resources, and ultimately monitored and coordinated timely access with older adults. CONCLUSION Participants' commitment and perseverance were conceptualized as "grit," central to their agency to conform to legislative and cultural norms. Moreover, findings support grit's power to motivate and sustain family caregiving, in order for older adults to age in place as long as possible with finite resources. IMPLICATIONS FOR THE PROFESSION This study highlights the importance of cultural awareness education for nurses, enabling continuity of care at a systems level and for a more resilient healthcare system. IMPACT Family care partners' grit may be crucial for nurses to harness when together, they face limited access to culturally appropriate health and social services in a system grounded in values of equity and inclusion, as in Canada. REPORTING METHOD When writing this manuscript, we adhered to relevant EQUATOR guidelines of the Consolidated Criteria for Reporting Qualitative Research (COREQ). PATIENT OR PUBLIC INVOLVEMENT AND ENGAGEMENT No patient or public involvement.
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Affiliation(s)
- D Y L Leung
- School of Nursing, The Hong Kong Polytechnic University, Hong Kong, Hong Kong
| | - C T Lee
- Daphne Cockwell School of Nursing, Toronto Metropolitan University, Toronto, Ontario, Canada
| | - S Y J Chu
- Daphne Cockwell School of Nursing, Toronto Metropolitan University, Toronto, Ontario, Canada
| | - F Ng
- Daphne Cockwell School of Nursing, Toronto Metropolitan University, Toronto, Ontario, Canada
| | - P Wen
- Daphne Cockwell School of Nursing, Toronto Metropolitan University, Toronto, Ontario, Canada
| | - J Fan
- Daphne Cockwell School of Nursing, Toronto Metropolitan University, Toronto, Ontario, Canada
| | - D S K Cheung
- School of Nursing, The Hong Kong Polytechnic University, Hong Kong, Hong Kong
| | - L Seto Nielsen
- School of Nursing, York University, Toronto, Ontario, Canada
| | - S Guruge
- Daphne Cockwell School of Nursing, Toronto Metropolitan University, Toronto, Ontario, Canada
| | - J Wong
- Stronach Regional Cancer Centre at Southlake, Newmarket, Ontario, Canada
- Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
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Liu SS, Jiang TX, Bu F, Zhao JL, Wang GF, Yang GH, Kong JY, Qie YF, Wen P, Fan LB, Li NN, Gao N, Qiu XB. Molecular mechanisms underlying the BIRC6-mediated regulation of apoptosis and autophagy. Nat Commun 2024; 15:891. [PMID: 38291026 PMCID: PMC10827748 DOI: 10.1038/s41467-024-45222-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Accepted: 01/16/2024] [Indexed: 02/01/2024] Open
Abstract
Procaspase 9 is the initiator caspase for apoptosis, but how its levels and activities are maintained remains unclear. The gigantic Inhibitor-of-Apoptosis Protein BIRC6/BRUCE/Apollon inhibits both apoptosis and autophagy by promoting ubiquitylation of proapoptotic factors and the key autophagic protein LC3, respectively. Here we show that BIRC6 forms an anti-parallel U-shaped dimer with multiple previously unannotated domains, including a ubiquitin-like domain, and the proapoptotic factor Smac/DIABLO binds BIRC6 in the central cavity. Notably, Smac outcompetes the effector caspase 3 and the pro-apoptotic protease HtrA2, but not procaspase 9, for binding BIRC6 in cells. BIRC6 also binds LC3 through its LC3-interacting region, probably following dimer disruption of this BIRC6 region. Mutation at LC3 ubiquitylation site promotes autophagy and autophagic degradation of BIRC6. Moreover, induction of autophagy promotes autophagic degradation of BIRC6 and caspase 9, but not of other effector caspases. These results are important to understand how the balance between apoptosis and autophagy is regulated under pathophysiological conditions.
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Affiliation(s)
- Shuo-Shuo Liu
- State Key Laboratory of Cognitive Neuroscience & Learning and Ministry of Education Key Laboratory of Cell Proliferation & Regulation Biology, College of Life Sciences, Beijing Normal University, 19 Xinjiekouwai Avenue, Beijing, 100875, China
| | - Tian-Xia Jiang
- State Key Laboratory of Cognitive Neuroscience & Learning and Ministry of Education Key Laboratory of Cell Proliferation & Regulation Biology, College of Life Sciences, Beijing Normal University, 19 Xinjiekouwai Avenue, Beijing, 100875, China
| | - Fan Bu
- State Key Laboratory of Cognitive Neuroscience & Learning and Ministry of Education Key Laboratory of Cell Proliferation & Regulation Biology, College of Life Sciences, Beijing Normal University, 19 Xinjiekouwai Avenue, Beijing, 100875, China
| | - Ji-Lan Zhao
- State Key Laboratory of Cognitive Neuroscience & Learning and Ministry of Education Key Laboratory of Cell Proliferation & Regulation Biology, College of Life Sciences, Beijing Normal University, 19 Xinjiekouwai Avenue, Beijing, 100875, China
| | - Guang-Fei Wang
- State Key Laboratory of Cognitive Neuroscience & Learning and Ministry of Education Key Laboratory of Cell Proliferation & Regulation Biology, College of Life Sciences, Beijing Normal University, 19 Xinjiekouwai Avenue, Beijing, 100875, China
| | - Guo-Heng Yang
- State Key Laboratory of Cognitive Neuroscience & Learning and Ministry of Education Key Laboratory of Cell Proliferation & Regulation Biology, College of Life Sciences, Beijing Normal University, 19 Xinjiekouwai Avenue, Beijing, 100875, China
| | - Jie-Yan Kong
- State Key Laboratory of Cognitive Neuroscience & Learning and Ministry of Education Key Laboratory of Cell Proliferation & Regulation Biology, College of Life Sciences, Beijing Normal University, 19 Xinjiekouwai Avenue, Beijing, 100875, China
| | - Yun-Fan Qie
- State Key Laboratory of Cognitive Neuroscience & Learning and Ministry of Education Key Laboratory of Cell Proliferation & Regulation Biology, College of Life Sciences, Beijing Normal University, 19 Xinjiekouwai Avenue, Beijing, 100875, China
| | - Pei Wen
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu, 211198, China
- College of Life Sciences, Anhui Medical University, Hefei, Anhui, 230032, China
| | - Li-Bin Fan
- College of Life Sciences, Anhui Medical University, Hefei, Anhui, 230032, China
| | - Ning-Ning Li
- State Key Laboratory of Membrane Biology, Peking-Tsinghua Joint Center for Life Sciences, School of Life Sciences, Peking University, Beijing, 100871, China.
| | - Ning Gao
- State Key Laboratory of Membrane Biology, Peking-Tsinghua Joint Center for Life Sciences, School of Life Sciences, Peking University, Beijing, 100871, China.
| | - Xiao-Bo Qiu
- State Key Laboratory of Cognitive Neuroscience & Learning and Ministry of Education Key Laboratory of Cell Proliferation & Regulation Biology, College of Life Sciences, Beijing Normal University, 19 Xinjiekouwai Avenue, Beijing, 100875, China.
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu, 211198, China.
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Lee JG, Fu Y, Zhu JY, Wen P, van de Leemput J, Ray PE, Han Z. A SNARE protective pool antagonizes APOL1 renal toxicity in Drosophila nephrocytes. Cell Biosci 2023; 13:199. [PMID: 37925499 PMCID: PMC10625211 DOI: 10.1186/s13578-023-01147-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Accepted: 10/12/2023] [Indexed: 11/06/2023] Open
Abstract
BACKGROUND People of Sub-Saharan African ancestry are at higher risk of developing chronic kidney disease (CKD), attributed to the Apolipoprotein L1 (APOL1) gene risk alleles (RA) G1 and G2. The underlying mechanisms by which the APOL1-RA precipitate CKD remain elusive, hindering the development of potential treatments. RESULTS Using a Drosophila genetic modifier screen, we found that SNARE proteins (Syx7, Ykt6, and Syb) play an important role in preventing APOL1 cytotoxicity. Reducing the expression of these SNARE proteins significantly increased APOL1 cytotoxicity in fly nephrocytes, the equivalent of mammalian podocytes, whereas overexpression of Syx7, Ykt6, or Syb attenuated their toxicity in nephrocytes. These SNARE proteins bound to APOL1-G0 with higher affinity than APOL1-G1/G2, and attenuated APOL1-G0 cytotoxicity to a greater extent than either APOL1-RA. CONCLUSIONS Using a Drosophila screen, we identified SNARE proteins (Syx7, Ykt6, and Syb) as antagonists of APOL1-induced cytotoxicity by directly binding APOL1. These data uncovered a new potential protective role for certain SNARE proteins in the pathogenesis of APOL1-CKD and provide novel therapeutic targets for APOL1-associated nephropathies.
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Affiliation(s)
- Jin-Gu Lee
- Center for Precision Disease Modeling, Department of Medicine, University of Maryland School of Medicine (UMSOM), 670 West Baltimore Street, 4052 HSFIII, Baltimore, MD, 21201, USA
- Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, 21201, USA
| | - Yulong Fu
- Center for Precision Disease Modeling, Department of Medicine, University of Maryland School of Medicine (UMSOM), 670 West Baltimore Street, 4052 HSFIII, Baltimore, MD, 21201, USA
- Department of Pathology, University of Alabama Birmingham, Birmingham, AL, 35249, USA
| | - Jun-Yi Zhu
- Center for Precision Disease Modeling, Department of Medicine, University of Maryland School of Medicine (UMSOM), 670 West Baltimore Street, 4052 HSFIII, Baltimore, MD, 21201, USA
- Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, 21201, USA
| | - Pei Wen
- Center for Precision Disease Modeling, Department of Medicine, University of Maryland School of Medicine (UMSOM), 670 West Baltimore Street, 4052 HSFIII, Baltimore, MD, 21201, USA
- Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, 21201, USA
| | - Joyce van de Leemput
- Center for Precision Disease Modeling, Department of Medicine, University of Maryland School of Medicine (UMSOM), 670 West Baltimore Street, 4052 HSFIII, Baltimore, MD, 21201, USA
- Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, 21201, USA
| | - Patricio E Ray
- Child Health Research Center, Department of Pediatrics, University of Virginia School of Medicine, 409 Lane Road, Charlottesville, VA, 22908, USA.
| | - Zhe Han
- Center for Precision Disease Modeling, Department of Medicine, University of Maryland School of Medicine (UMSOM), 670 West Baltimore Street, 4052 HSFIII, Baltimore, MD, 21201, USA.
- Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, 21201, USA.
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Yang D, Li J, Li Z, Zhao M, Wang D, Sun Z, Wen P, Gou F, Dai Y, Ji Y, Li W, Zhao D, Yang L. Cardiolipin externalization mediates prion protein (PrP) peptide 106-126-associated mitophagy and mitochondrial dysfunction. Front Mol Neurosci 2023; 16:1163981. [PMID: 37333615 PMCID: PMC10272765 DOI: 10.3389/fnmol.2023.1163981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Accepted: 05/02/2023] [Indexed: 06/20/2023] Open
Abstract
Proper mitochondrial performance is imperative for the maintenance of normal neuronal function to prevent the development of neurodegenerative diseases. Persistent accumulation of damaged mitochondria plays a role in prion disease pathogenesis, which involves a chain of events that culminate in the generation of reactive oxygen species and neuronal death. Our previous studies have demonstrated that PINK1/Parkin-mediated mitophagy induced by PrP106-126 is defective and leads to an accumulation of damaged mitochondria after PrP106-126 treatment. Externalized cardiolipin (CL), a mitochondria-specific phospholipid, has been reported to play a role in mitophagy by directly interacting with LC3II at the outer mitochondrial membrane. The involvement of CL externalization in PrP106-126-induced mitophagy and its significance in other physiological processes of N2a cells treated with PrP106-126 remain unknown. We demonstrate that the PrP106-126 peptide caused a temporal course of mitophagy in N2a cells, which gradually increased and subsequently decreased. A similar trend in CL externalization to the mitochondrial surface was seen, resulting in a gradual decrease in CL content at the cellular level. Inhibition of CL externalization by knockdown of CL synthase, responsible for de novo synthesis of CL, or phospholipid scramblase-3 and NDPK-D, responsible for CL translocation to the mitochondrial surface, significantly decreased PrP106-126-induced mitophagy in N2a cells. Meanwhile, the inhibition of CL redistribution significantly decreased PINK1 and DRP1 recruitment in PrP106-126 treatment but had no significant decrease in Parkin recruitment. Furthermore, the inhibition of CL externalization resulted in impaired oxidative phosphorylation and severe oxidative stress, which led to mitochondrial dysfunction. Our results indicate that CL externalization induced by PrP106-126 on N2a cells plays a positive role in the initiation of mitophagy, leading to the stabilization of mitochondrial function.
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Zhang S, Liu H, Sun C, Wu X, Wen P, Yu F, Zhang J. MSTA-SlowFast: A Student Behavior Detector for Classroom Environments. Sensors (Basel) 2023; 23:s23115205. [PMID: 37299931 DOI: 10.3390/s23115205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 05/01/2023] [Accepted: 05/22/2023] [Indexed: 06/12/2023]
Abstract
Detecting students' classroom behaviors from instructional videos is important for instructional assessment, analyzing students' learning status, and improving teaching quality. To achieve effective detection of student classroom behavior based on videos, this paper proposes a classroom behavior detection model based on the improved SlowFast. First, a Multi-scale Spatial-Temporal Attention (MSTA) module is added to SlowFast to improve the ability of the model to extract multi-scale spatial and temporal information in the feature maps. Second, Efficient Temporal Attention (ETA) is introduced to make the model more focused on the salient features of the behavior in the temporal domain. Finally, a spatio-temporal-oriented student classroom behavior dataset is constructed. The experimental results show that, compared with SlowFast, our proposed MSTA-SlowFast has a better detection performance with mean average precision (mAP) improvement of 5.63% on the self-made classroom behavior detection dataset.
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Affiliation(s)
- Shiwen Zhang
- College of Information Science and Engineering, Hunan Normal University, Changsha 410081, China
| | - Hong Liu
- College of Information Science and Engineering, Hunan Normal University, Changsha 410081, China
| | - Cheng Sun
- School of Mathematics and Statistics, Hunan Normal University, Changsha 410081, China
| | - Xingjin Wu
- College of Information Science and Engineering, Hunan Normal University, Changsha 410081, China
| | - Pei Wen
- College of Information Science and Engineering, Hunan Normal University, Changsha 410081, China
| | - Fei Yu
- School of Computer and Communication Engineering, Changsha University of Science & Technology, Changsha 410114, China
| | - Jin Zhang
- College of Information Science and Engineering, Hunan Normal University, Changsha 410081, China
- School of Computer and Communication Engineering, Changsha University of Science & Technology, Changsha 410114, China
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Han SK, McNulty MT, Benway CJ, Wen P, Greenberg A, Onuchic-Whitford AC, Jang D, Flannick J, Burtt NP, Wilson PC, Humphreys BD, Wen X, Han Z, Lee D, Sampson MG. Mapping genomic regulation of kidney disease and traits through high-resolution and interpretable eQTLs. Nat Commun 2023; 14:2229. [PMID: 37076491 PMCID: PMC10115815 DOI: 10.1038/s41467-023-37691-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Accepted: 03/27/2023] [Indexed: 04/21/2023] Open
Abstract
Expression quantitative trait locus (eQTL) studies illuminate genomic variants that regulate specific genes and contribute to fine-mapped loci discovered via genome-wide association studies (GWAS). Efforts to maximize their accuracy are ongoing. Using 240 glomerular (GLOM) and 311 tubulointerstitial (TUBE) micro-dissected samples from human kidney biopsies, we discovered 5371 GLOM and 9787 TUBE genes with at least one variant significantly associated with expression (eGene) by incorporating kidney single-nucleus open chromatin data and transcription start site distance as an "integrative prior" for Bayesian statistical fine-mapping. The use of an integrative prior resulted in higher resolution eQTLs illustrated by (1) smaller numbers of variants in credible sets with greater confidence, (2) increased enrichment of partitioned heritability for GWAS of two kidney traits, (3) an increased number of variants colocalized with the GWAS loci, and (4) enrichment of computationally predicted functional regulatory variants. A subset of variants and genes were validated experimentally in vitro and using a Drosophila nephrocyte model. More broadly, this study demonstrates that tissue-specific eQTL maps informed by single-nucleus open chromatin data have enhanced utility for diverse downstream analyses.
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Affiliation(s)
- Seong Kyu Han
- Division of Pediatric Nephrology, Boston Children's Hospital, Boston, MA, USA
- Department of Pediatrics, Harvard Medical School, Boston, MA, USA
- Kidney Disease Initiative, Broad Institute, Cambridge, MA, USA
| | - Michelle T McNulty
- Division of Pediatric Nephrology, Boston Children's Hospital, Boston, MA, USA
- Kidney Disease Initiative, Broad Institute, Cambridge, MA, USA
| | - Christopher J Benway
- Division of Pediatric Nephrology, Boston Children's Hospital, Boston, MA, USA
- Kidney Disease Initiative, Broad Institute, Cambridge, MA, USA
| | - Pei Wen
- Center for Precision Disease Modeling, University of Maryland, School of Medicine, Baltimore, MD, USA
| | - Anya Greenberg
- Division of Pediatric Nephrology, Boston Children's Hospital, Boston, MA, USA
- Kidney Disease Initiative, Broad Institute, Cambridge, MA, USA
| | - Ana C Onuchic-Whitford
- Division of Pediatric Nephrology, Boston Children's Hospital, Boston, MA, USA
- Kidney Disease Initiative, Broad Institute, Cambridge, MA, USA
- Division of Renal Medicine, Brigham and Women's Hospital, Boston, MA, USA
| | - Dongkeun Jang
- Programs in Metabolism and Medical and Population Genetics, Broad Institute, Cambridge, MA, USA
| | - Jason Flannick
- Department of Pediatrics, Harvard Medical School, Boston, MA, USA
- Programs in Metabolism and Medical and Population Genetics, Broad Institute, Cambridge, MA, USA
- Division of Genetics and Genomics, Boston Children's Hospital, Boston, MA, USA
| | - Noël P Burtt
- Programs in Metabolism and Medical and Population Genetics, Broad Institute, Cambridge, MA, USA
| | - Parker C Wilson
- Department of Pathology and Immunology, Washington University in St. Louis, St. Louis, MO, USA
| | - Benjamin D Humphreys
- Division of Nephrology, Department of Medicine, Washington University in St. Louis, St. Louis, MO, USA
- Department of Developmental Biology, Washington University in St. Louis, St. Louis, MO, USA
| | - Xiaoquan Wen
- Department of Biostatistics, School of Public Health, University of Michigan, Ann Arbor, MI, USA
| | - Zhe Han
- Center for Precision Disease Modeling, University of Maryland, School of Medicine, Baltimore, MD, USA.
| | - Dongwon Lee
- Division of Pediatric Nephrology, Boston Children's Hospital, Boston, MA, USA.
- Department of Pediatrics, Harvard Medical School, Boston, MA, USA.
- Kidney Disease Initiative, Broad Institute, Cambridge, MA, USA.
- Manton Center for Orphan Disease Research, Boston Children's Hospital, Boston, MA, USA.
| | - Matthew G Sampson
- Division of Pediatric Nephrology, Boston Children's Hospital, Boston, MA, USA.
- Department of Pediatrics, Harvard Medical School, Boston, MA, USA.
- Kidney Disease Initiative, Broad Institute, Cambridge, MA, USA.
- Division of Renal Medicine, Brigham and Women's Hospital, Boston, MA, USA.
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White K, Connor K, Meylan M, Bougoüin A, Salvucci M, Bielle F, O'Farrell AC, Sweeney K, Weng L, Bergers G, Dicker P, Ashley DM, Lipp ES, Low JT, Zhao J, Wen P, Prins R, Verreault M, Idbaih A, Biswas A, Prehn JHM, Lambrechts D, Arijs I, Lodi F, Dilcan G, Lamfers M, Leenstra S, Fabro F, Ntafoulis I, Kros JM, Cryan J, Brett F, Quissac E, Beausang A, MacNally S, O'Halloran P, Clerkin J, Bacon O, Kremer A, Chi Yen RT, Varn FS, Verhaak RGW, Sautès-Fridman C, Fridman WH, Byrne AT. Identification, validation and biological characterisation of novel glioblastoma tumour microenvironment subtypes: implications for precision immunotherapy. Ann Oncol 2023; 34:300-314. [PMID: 36494005 DOI: 10.1016/j.annonc.2022.11.008] [Citation(s) in RCA: 24] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 11/14/2022] [Accepted: 11/15/2022] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND New precision medicine therapies are urgently required for glioblastoma (GBM). However, to date, efforts to subtype patients based on molecular profiles have failed to direct treatment strategies. We hypothesised that interrogation of the GBM tumour microenvironment (TME) and identification of novel TME-specific subtypes could inform new precision immunotherapy treatment strategies. MATERIALS AND METHODS A refined and validated microenvironment cell population (MCP) counter method was applied to >800 GBM patient tumours (GBM-MCP-counter). Specifically, partition around medoids (PAM) clustering of GBM-MCP-counter scores in the GLIOTRAIN discovery cohort identified three novel patient clusters, uniquely characterised by TME composition, functional orientation markers and immune checkpoint proteins. Validation was carried out in three independent GBM-RNA-seq datasets. Neoantigen, mutational and gene ontology analysis identified mutations and uniquely altered pathways across subtypes. The longitudinal Glioma Longitudinal AnalySiS (GLASS) cohort and three immunotherapy clinical trial cohorts [treatment with neoadjuvant/adjuvant anti-programmed cell death protein 1 (PD-1) or PSVRIPO] were further interrogated to assess subtype alterations between primary and recurrent tumours and to assess the utility of TME classifiers as immunotherapy biomarkers. RESULTS TMEHigh tumours (30%) displayed elevated lymphocyte, myeloid cell immune checkpoint, programmed cell death protein 1 (PD-1) and cytotoxic T-lymphocyte-associated protein 4 transcripts. TMEHigh/mesenchymal+ patients featured tertiary lymphoid structures. TMEMed (46%) tumours were enriched for endothelial cell gene expression profiles and displayed heterogeneous immune populations. TMELow (24%) tumours were manifest as an 'immune-desert' group. TME subtype transitions upon recurrence were identified in the longitudinal GLASS cohort. Assessment of GBM immunotherapy trial datasets revealed that TMEHigh patients receiving neoadjuvant anti-PD-1 had significantly increased overall survival (P = 0.04). Moreover, TMEHigh patients treated with adjuvant anti-PD-1 or oncolytic virus (PVSRIPO) showed a trend towards improved survival. CONCLUSIONS We have established a novel TME-based classification system for application in intracranial malignancies. TME subtypes represent canonical 'termini a quo' (starting points) to support an improved precision immunotherapy treatment approach.
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Affiliation(s)
- K White
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - K Connor
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - M Meylan
- Centre de Recherche des Cordeliers, INSERM, Sorbonne Université, USPC, Université de Paris, Paris, France
| | - A Bougoüin
- Centre de Recherche des Cordeliers, INSERM, Sorbonne Université, USPC, Université de Paris, Paris, France
| | - M Salvucci
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - F Bielle
- Paris Brain Institute (ICM), CNRS UMR 7225, Inserm U 1127, UPMC-P6 UMR S 1127, Hôpital de la Pitié-Salpêtrière, Paris, France
| | - A C O'Farrell
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - K Sweeney
- National Centre of Neurosurgery, Beaumont Hospital, Dublin, Ireland
| | - L Weng
- VIB-KU Leuven Center for Cancer Biology, Department of Oncology, Leuven, Belgium
| | - G Bergers
- VIB-KU Leuven Center for Cancer Biology, Department of Oncology, Leuven, Belgium
| | - P Dicker
- Epidemiology & Public Health, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - D M Ashley
- Duke Cancer Institute, Duke University, Durham, USA
| | - E S Lipp
- Duke Cancer Institute, Duke University, Durham, USA
| | - J T Low
- Duke Cancer Institute, Duke University, Durham, USA
| | - J Zhao
- Department of Systems Biology at Columbia University, New York, USA
| | - P Wen
- Center for Neuro-Oncology, Dana-Farber Cancer Institute, Boston, USA
| | - R Prins
- Department of Medical and Molecular Pharmacology, David Geffen School of Medicine, University of California, Los Angeles, USA
| | - M Verreault
- Paris Brain Institute (ICM), CNRS UMR 7225, Inserm U 1127, UPMC-P6 UMR S 1127, Hôpital de la Pitié-Salpêtrière, Paris, France
| | - A Idbaih
- Sorbonne Université, Inserm, CNRS, UMR S 1127, Paris Brain Institute (ICM), AP-HP, Hôpitaux Universitaires La Pitié Salpêtrière-Charles Foix, Paris, France
| | - A Biswas
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - J H M Prehn
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - D Lambrechts
- Laboratory for Translational Genetics, Department of Human Genetics, Leuven, Belgium; VIB Center for Cancer Biology, Leuven, Belgium
| | - I Arijs
- Laboratory for Translational Genetics, Department of Human Genetics, Leuven, Belgium; VIB Center for Cancer Biology, Leuven, Belgium
| | - F Lodi
- Laboratory for Translational Genetics, Department of Human Genetics, Leuven, Belgium; VIB Center for Cancer Biology, Leuven, Belgium
| | - G Dilcan
- Laboratory for Translational Genetics, Department of Human Genetics, Leuven, Belgium; VIB Center for Cancer Biology, Leuven, Belgium
| | - M Lamfers
- Department of Neurosurgery, Brain Tumor Center, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - S Leenstra
- Department of Neurosurgery, Brain Tumor Center, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - F Fabro
- Department of Neurosurgery, Brain Tumor Center, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - I Ntafoulis
- Department of Neurosurgery, Brain Tumor Center, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - J M Kros
- Department of Pathology, Erasmus Medical Center, Rotterdam, the Netherlands
| | - J Cryan
- Department of Neuropathology, Beaumont Hospital, Dublin, Ireland
| | - F Brett
- Department of Neuropathology, Beaumont Hospital, Dublin, Ireland
| | - E Quissac
- Paris Brain Institute (ICM), CNRS UMR 7225, Inserm U 1127, UPMC-P6 UMR S 1127, Hôpital de la Pitié-Salpêtrière, Paris, France
| | - A Beausang
- Department of Neuropathology, Beaumont Hospital, Dublin, Ireland
| | - S MacNally
- National Centre of Neurosurgery, Beaumont Hospital, Dublin, Ireland
| | - P O'Halloran
- National Centre of Neurosurgery, Beaumont Hospital, Dublin, Ireland
| | - J Clerkin
- National Centre of Neurosurgery, Beaumont Hospital, Dublin, Ireland
| | - O Bacon
- Department of Neuropathology, Beaumont Hospital, Dublin, Ireland
| | - A Kremer
- Information Technology for Translational Medicine (ITTM), Luxembourg, Luxembourg
| | - R T Chi Yen
- Information Technology for Translational Medicine (ITTM), Luxembourg, Luxembourg
| | - F S Varn
- The Jackson Laboratory for Genomic Medicine, Farmington, USA
| | - R G W Verhaak
- The Jackson Laboratory for Genomic Medicine, Farmington, USA; Department of Neurosurgery, Cancer Center Amsterdam, Amsterdam University Medical Centers, VU University Medical Center, Amsterdam, the Netherlands
| | - C Sautès-Fridman
- Centre de Recherche des Cordeliers, INSERM, Sorbonne Université, USPC, Université de Paris, Paris, France
| | - W H Fridman
- Centre de Recherche des Cordeliers, INSERM, Sorbonne Université, USPC, Université de Paris, Paris, France
| | - A T Byrne
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin, Ireland.
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9
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Li J, Yang D, Li Z, Zhao M, Wang D, Sun Z, Wen P, Dai Y, Gou F, Ji Y, Zhao D, Yang L. PINK1/Parkin-mediated mitophagy in neurodegenerative diseases. Ageing Res Rev 2023; 84:101817. [PMID: 36503124 DOI: 10.1016/j.arr.2022.101817] [Citation(s) in RCA: 32] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 11/21/2022] [Accepted: 12/06/2022] [Indexed: 12/13/2022]
Abstract
Mitochondria play key roles in bioenergetics, metabolism, and signaling; therefore, stable mitochondrial function is essential for cell survival, particularly in energy-intensive neuronal cells. In neurodegenerative diseases, damaged mitochondria accumulate in neurons causing associated bioenergetics deficiency, impaired cell signaling, defective cytoplasmic calcium buffering, and other pathological changes. Mitochondrial quality control is an important mechanism to ensure the maintenance of mitochondrial health, homeostasis, and mitophagy, the latter of which is a pathway that delivers defective mitochondria to the lysosome for degradation. Defective mitophagy is thought to be responsible for the accumulation of damaged mitochondria, which leads to cellular dysfunction and/or death in neurodegenerative diseases. PINK1/Parkin mainly regulates ubiquitin-dependent mitophagy, which is crucial for many aspects of mitochondrial physiology, particularly the initiation of autophagic mechanisms. Therefore, in the present review, we summarize the current knowledge of the conventional mitophagy pathway, focusing on the molecular mechanisms underlying mitophagy dysregulation in prion disease and other age-related neurodegenerative diseases, especially in relation to the PINK1/Parkin pathway. Moreover, we list the inducers of mitophagy that possess neuroprotective effects, in addition to their mechanisms related to the PINK1/Parkin pathway. These mechanisms may provide potential interventions centered on the regulation of mitophagy and offer therapeutic strategies for the treatment of neurodegenerative diseases.
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Affiliation(s)
- Jie Li
- National Animal Transmissible Spongiform Encephalopathy Laboratory, College of Veterinary Medicine, State Key Laboratories for Agrobiotechnology, Key Laboratory of Animal Epidemiology of Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing, China
| | - Dongming Yang
- National Animal Transmissible Spongiform Encephalopathy Laboratory, College of Veterinary Medicine, State Key Laboratories for Agrobiotechnology, Key Laboratory of Animal Epidemiology of Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing, China
| | - Zhiping Li
- National Animal Transmissible Spongiform Encephalopathy Laboratory, College of Veterinary Medicine, State Key Laboratories for Agrobiotechnology, Key Laboratory of Animal Epidemiology of Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing, China
| | - Mengyang Zhao
- National Animal Transmissible Spongiform Encephalopathy Laboratory, College of Veterinary Medicine, State Key Laboratories for Agrobiotechnology, Key Laboratory of Animal Epidemiology of Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing, China
| | - Dongdong Wang
- National Animal Transmissible Spongiform Encephalopathy Laboratory, College of Veterinary Medicine, State Key Laboratories for Agrobiotechnology, Key Laboratory of Animal Epidemiology of Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing, China
| | - Zhixin Sun
- National Animal Transmissible Spongiform Encephalopathy Laboratory, College of Veterinary Medicine, State Key Laboratories for Agrobiotechnology, Key Laboratory of Animal Epidemiology of Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing, China
| | - Pei Wen
- National Animal Transmissible Spongiform Encephalopathy Laboratory, College of Veterinary Medicine, State Key Laboratories for Agrobiotechnology, Key Laboratory of Animal Epidemiology of Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing, China
| | - Yuexin Dai
- National Animal Transmissible Spongiform Encephalopathy Laboratory, College of Veterinary Medicine, State Key Laboratories for Agrobiotechnology, Key Laboratory of Animal Epidemiology of Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing, China
| | - Fengting Gou
- National Animal Transmissible Spongiform Encephalopathy Laboratory, College of Veterinary Medicine, State Key Laboratories for Agrobiotechnology, Key Laboratory of Animal Epidemiology of Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing, China
| | - Yilan Ji
- National Animal Transmissible Spongiform Encephalopathy Laboratory, College of Veterinary Medicine, State Key Laboratories for Agrobiotechnology, Key Laboratory of Animal Epidemiology of Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing, China
| | - Deming Zhao
- National Animal Transmissible Spongiform Encephalopathy Laboratory, College of Veterinary Medicine, State Key Laboratories for Agrobiotechnology, Key Laboratory of Animal Epidemiology of Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing, China
| | - Lifeng Yang
- National Animal Transmissible Spongiform Encephalopathy Laboratory, College of Veterinary Medicine, State Key Laboratories for Agrobiotechnology, Key Laboratory of Animal Epidemiology of Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing, China.
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10
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Wick W, Gamelas Magalhaes J, Dos Santos Leite A, IdBaih A, Vieito Villar M, Tabatabai G, Stradella A, Ghiringhelli F, Burger M, Mildenberger I, Herrlinger U, Touat M, Wen P, Wick A, Toussaint H, Gouttefangeas C, Bonny C, Paillarse JM, Reardon D. 185P Interim analysis of the EOGBM1-18 study: Strong immune response to therapeutic vaccination with EO2401 microbiome derived therapeutic vaccine + nivolumab. Immuno-Oncology and Technology 2022. [DOI: 10.1016/j.iotech.2022.100297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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11
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Wick W, IdBaih A, Vieito Villar M, Tabatabai G, Stradella A, Ghiringhelli F, Burger M, Mildenberger I, Herrlinger U, Touat M, Wen P, Wick A, Gouttefangeas C, Maia A, Bonny C, Paillarse JM, Fagerberg J, Reardon D. 170P EO2401 microbiome derived therapeutic vaccine + nivolumab +/- bevacizumab, in neoadjuvant, adjuvant and non-surgery linked treatment of recurrent glioblastoma: Phase I-II EOGBM1-18/ROSALIE study. Immuno-Oncology and Technology 2022. [DOI: 10.1016/j.iotech.2022.100282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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12
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Yan Y, Yang D, Wen P, Li Y, Ge Y, Ma P, Yuan J, Zhang P, Zhu Z, Luo X, Yu X, Wang H. Expression analysis of irisin during different development stages of skeletal muscle in mice. Gene Expr Patterns 2022; 46:119287. [PMID: 36341975 DOI: 10.1016/j.gep.2022.119287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Revised: 10/16/2022] [Accepted: 10/24/2022] [Indexed: 11/04/2022]
Abstract
BACKGROUND As a newly discovered muscle factor secreted by skeletal muscle cells, irisin is a polypeptide fragment formed from hydrolysis of fibronectin type Ⅲ domain-containing protein 5 (FNDC5). Irisin can promote beigeing of white adipose tissue (WAT) and regulate glucose and lipid metabolisms. However, the functions of irisin in skeletal muscle development remain largely unknown. In order to characterize the expression of irisin, this study investigated the expression of irisin precursor FNDC5 in myoblasts and skeletal muscles during different developmental stages of SPF mice. RESULTS The Western blot, quantitative real-time PCR (qRT-PCR), and immunofluorescence assay results showed that FNDC5 was expressed in all the developmental stages of myoblasts and gastrocnemius, but its expression differed at different stages. FNDC5 protein exhibited the highest expression in gastrocnemius of sexually mature mice, followed by elderly mice and adolescent mice, and it displayed the lowest expression in pups. Additionally, FNDC5 protein was mainly expressed in cytoplasm, and it had the highest expression in primary myoblasts, followed by the myotubes with the lowest expression in C2C12 myogenic cells. CONCLUSIONS Overall, FNDC5 was mainly expressed in cytoplasm and extracellular matrix with different expression levels at different developmental stages of skeletal muscle cells and tissues in mice. This study will provide new strategies for promoting skeletal muscle development and treating muscle- and metabolism-related disease by using irisin.
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Affiliation(s)
- Yi Yan
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong, Shanxi, 030801, PR China
| | - Ding Yang
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong, Shanxi, 030801, PR China
| | - Pei Wen
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong, Shanxi, 030801, PR China
| | - Yilei Li
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong, Shanxi, 030801, PR China
| | - Yufang Ge
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong, Shanxi, 030801, PR China
| | - Pei Ma
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong, Shanxi, 030801, PR China
| | - Jiahui Yuan
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong, Shanxi, 030801, PR China
| | - Pengxiang Zhang
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong, Shanxi, 030801, PR China
| | - Zhiwei Zhu
- College of Life Science, Shanxi Agricultural University, Jinzhong, Shanxi, 030801, PR China
| | - Xiaomao Luo
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong, Shanxi, 030801, PR China
| | - Xiuju Yu
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong, Shanxi, 030801, PR China
| | - Haidong Wang
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong, Shanxi, 030801, PR China.
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13
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Weller M, Ellingson B, Alexander B, Wen P, Sulman E, Colman H, Berry D, Tanner K, Khasraw M, Lim M, Perry J, Lassman A, Cloughesy T, Yung WKA, Lee EQ, Mellinghoff I, Gordon G, de Groot J, Mikkelsen T, Cavenee W, Nelli A, Buxton M, Li W. P11.65.B GBM AGILE: A global, phase 2/3 adaptive platform trial to evaluate multiple treatment regimens in newly diagnosed and recurrent glioblastoma. Neuro Oncol 2022. [DOI: 10.1093/neuonc/noac174.254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
GBM AGILE (Glioblastoma Adaptive, Global, Innovative Learning Environment) is a biomarker based, multi-arm, international, seamless Phase 2/3 Response Adaptive Randomization platform trial designed to rapidly identify experimental therapies that improve overall survival and confirm efficacious experimental therapies and associated biomarker signatures to support new drug approvals and registration. It is a collaboration between academic investigators, patient organizations and industry, under the sponsorship of the non-profit organization, Global Coalition for Adaptive Research, to support new drug applications for newly diagnosed and recurrent GBM.
Material and Methods
The primary objective of GBM AGILE is to identify therapies that effectively improve overall survival in patients with newly diagnosed or recurrent GBM. Bayesian response adaptive randomization is used within subtypes of the disease to assign participants to investigational arms based on their performance. Operating under a master protocol, GBM AGILE allows multiple drugs from different pharmaceutical companies to be evaluated simultaneously and/or over time against a common control arm. Based on performance, a drug may graduate and move to a Stage 2 (Phase 3) within the trial, and the totality of the data can be used for a new drug application and registration process. New experimental therapies are added as information about promising new drugs is identified while other therapies are removed as they complete their evaluation. The master protocol/ trial infrastructure includes efficiencies through an adaptive trial design, shared control arm and operational processes such as risk-based monitoring and enhanced remote activities. With its adaptable structure, GBM AGILE has continued trial activation, inclusion of new investigational therapies, and enrollment globally through the challenges of a global pandemic.GBM AGILE provides an efficient mechanism to screen and develop robust information regarding the efficacy of proposed novel therapeutics and associated biomarkers for GBM and to quickly move therapies and biomarkers into clinic. GBM AGILE received initial approval from the United States FDA in April 2019, and in Europe through the Voluntary Harmonization Procedure (VHP) in April, 2021. As of 2022, AGILE has screened over 1000 patients studying multiple investigational treatments. Enrollment rates are 3 to 4 times greater than traditional GBM trials, with active sites averaging 0.75 to 1 patients/site/month.
Currently, there are 41 sites activated in the US, 4 in Canada and 2 in Switzerland and an estimated 24 sites yet to open in Germany, France, Switzerland, Italy and Austria. In addition to the continued expansion in Europe, effort is undergoing to extend the trial to China and Australia as well. Clinical trial information: NCT03970447
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Affiliation(s)
- M Weller
- Universitätsspital Zürich , Klinik für Neurologie, Zürich , Switzerland
| | - B Ellingson
- University of California , Los Angeles, CA , United States
| | - B Alexander
- Dana Farber Cancer Institute, Harvard University , Boston, MA , United States
| | - P Wen
- Dana Farber Cancer Institute , Boston, MA , United States
| | - E Sulman
- NYU Grossman School of Medicine , New York, NY , United States
| | - H Colman
- University of Utah, Salt Lake City, UT , United States
| | - D Berry
- Berry Consultants , Austin, TX , United States
| | - K Tanner
- National Brain Tumor Society , Newton, MA , United States
| | - M Khasraw
- Duke Cancer Institute, Duke University , Durham, NC , United States
| | - M Lim
- Stanford University , Stanford, CA , United States
| | - J Perry
- University of Toronto, Toronto , ON , Canada
| | - A Lassman
- Columbia University, New York City, NY , United States
| | - T Cloughesy
- University of California Los Angeles , Los Angeles, CA , United States
| | - W K A Yung
- UT MD Anderson Cancer Center , Houston, TX , United States
| | - E Q Lee
- Dana Farber Cancer Institute , Boston, MA , United States
| | - I Mellinghoff
- Memorial Sloan Kettering, New York City, NY , United States
| | - G Gordon
- Global Coalition for Adaptive Research , Larkspur, CA , United States
| | - J de Groot
- University of California, San Francisco , San Francisco, CA , United States
| | - T Mikkelsen
- Henry Ford Health , Detroit, MI , United States
| | - W Cavenee
- University of California San Diego , La Jolla, CA , United States
| | - A Nelli
- Global Coalition for Adaptive Research , Larkspur, CA , United States
| | - M Buxton
- Global Coalition for Adaptive Research , Larkspur, CA , United States
| | - W Li
- Beijing Tiantan Hospital, Capital Medical University , Beijing , China
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14
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van de Leemput J, Wen P, Han Z. Using Drosophila Nephrocytes to Understand the Formation and Maintenance of the Podocyte Slit Diaphragm. Front Cell Dev Biol 2022; 10:837828. [PMID: 35265622 PMCID: PMC8898902 DOI: 10.3389/fcell.2022.837828] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 02/01/2022] [Indexed: 12/12/2022] Open
Abstract
The podocyte slit diaphragm (SD) is an essential component of the glomerular filtration barrier and its disruption is a common cause of proteinuria and many types of kidney disease. Therefore, better understanding of the pathways and proteins that play key roles in SD formation and maintenance has been of great interest. Podocyte and SD biology have been mainly studied using mouse and other vertebrate models. However, vertebrates are limited by inherent properties and technically challenging in vivo access to the podocytes. Drosophila is a relatively new alternative model system but it has already made great strides. Past the initial obvious differences, mammalian podocytes and fly nephrocytes are remarkably similar at the genetic, molecular and functional levels. This review discusses SD formation and maintenance, and their dependence on cell polarity, the cytoskeleton, and endo- and exocytosis, as learned from studies in fly nephrocytes and mammalian podocytes. In addition, it reflects on the remaining gaps in our knowledge, the physiological implications for glomerular diseases and how we can leverage the advantages Drosophila has to offer to further our understanding.
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Affiliation(s)
- Joyce van de Leemput
- Center for Precision Disease Modeling, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, United States.,Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, United States
| | - Pei Wen
- Center for Precision Disease Modeling, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, United States.,Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, United States
| | - Zhe Han
- Center for Precision Disease Modeling, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, United States.,Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, United States
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15
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Frappaz D, Dhall G, Murray MJ, Goldman S, Faure Conter C, Allen J, Kortmann R, Haas-Kogen D, Morana G, Finlay J, Nicholson JC, Bartels U, Souweidane M, Schöenberger S, Vasiljevic A, Robertson P, Albanese A, Alapetite C, Czech T, Lau CC, Wen P, Schiff D, Shaw D, Calaminus G, Bouffet E. Intracranial germ cell tumors in Adolescents and Young Adults: European and North American consensus review, current management and future development. Neuro Oncol 2021; 24:516-527. [PMID: 34724065 PMCID: PMC8972311 DOI: 10.1093/neuonc/noab252] [Citation(s) in RCA: 52] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The incidence of intracranial germ cell tumors (iGCT) is much lower in European and North American (E&NA) than in Asian population. However, E&NA cooperative groups have simultaneously developed with success treatment strategies with specific attention paid to long-term sequelae. Neurological sequelae may be reduced by establishing a diagnosis with an endoscopic biopsy and/or cerebrospinal fluid (CSF) and/or serum analysis, deferring the need to perform a radical surgery. Depending on markers and/or histological characteristics, patients are treated as either germinoma or non-germinomatous germ cell tumors (NGGCT). Metastatic disease is defined by a positive CSF cytology and/or distant drops in craniospinal MRI. The combination of surgery and/or chemotherapy and radiation therapy is tailored according to grouping and staging. With more than 90% 5-year event-free survival (EFS), localized germinomas can be managed without aggressive surgery, and benefit from chemotherapy followed by whole ventricular irradiation with local boost. Bifocal germinomas are treated as non-metastatic entities. Metastatic germinomas may be cured with craniospinal irradiation. With a 5-year EFS over 70%, NGGCT benefit from chemotherapy followed by delayed surgery in case of residual disease, and some form of radiotherapy. Future strategies will aim at decreasing long-term side effects while preserving high cure rates.
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Affiliation(s)
- D Frappaz
- Institut d'Hématologie Oncologie Pédiatrique, Lyon, France
| | - G Dhall
- University of Alabama at Birmingham (UAB), Birmingham, USA
| | - M J Murray
- Department of Pathology, University of Cambridge, Cambridge, UK.,Department of Paediatric Haematology and Oncology, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | - S Goldman
- Phoenix Children's Hospital University of Arizona, USA
| | - C Faure Conter
- Institut d'Hématologie Oncologie Pédiatrique, Lyon, France
| | - J Allen
- NYU Grossman School, New York, USA
| | - R Kortmann
- University of Leipzig Medical Center; Leipzig, Germany
| | | | | | - J Finlay
- Nationwide Children's Hospital, Colombus, USA
| | - J C Nicholson
- Department of Paediatric Haematology and Oncology, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | - Ute Bartels
- The Hospital for Sick Children, University of Toronto, Toronto, Canada
| | - M Souweidane
- Memorial Sloan Kettering Cancer Center, New York, USA
| | - S Schöenberger
- Department of Pediatric Hematology and Oncology, University Hospital Essen, Essen, Germany
| | - A Vasiljevic
- Centre de Pathologie et Neuropathologie Est, Hospices Civils de Lyon, France
| | | | | | | | - T Czech
- Medical University of Vienna, Austria
| | - C C Lau
- Connecticut Children's Medical Center, USA
| | - P Wen
- University of Leipzig Medical Center; Leipzig, Germany
| | - D Schiff
- University of Virginia School of Medicine, Charlottesville, USA
| | - D Shaw
- Seattle Children's Hospital and University of Washington, Seattle USA
| | | | - E Bouffet
- The Hospital for Sick Children, University of Toronto, Toronto, Canada
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16
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Lamba N, Cagney D, Catalano P, Wen P, Haas-Kogan D, Aizer A. Predictors of Long-Term Survival Among Patients With Brain Metastases. Int J Radiat Oncol Biol Phys 2021. [DOI: 10.1016/j.ijrobp.2021.07.1541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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17
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Solanki AK, Arif E, Srivastava P, Furcht CM, Rahman B, Wen P, Singh A, Holzman LB, Fitzgibbon WR, Budisavljevic MN, Lobo GP, Kwon SH, Han Z, Lazzara MJ, Lipschutz JH, Nihalani D. Phosphorylation of slit diaphragm proteins NEPHRIN and NEPH1 upon binding of HGF promotes podocyte repair. J Biol Chem 2021; 297:101079. [PMID: 34391780 PMCID: PMC8429977 DOI: 10.1016/j.jbc.2021.101079] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 08/02/2021] [Accepted: 08/11/2021] [Indexed: 12/22/2022] Open
Abstract
Phosphorylation (activation) and dephosphorylation (deactivation) of the slit diaphragm proteins NEPHRIN and NEPH1 are critical for maintaining the kidney epithelial podocyte actin cytoskeleton and, therefore, proper glomerular filtration. However, the mechanisms underlying these events remain largely unknown. Here we show that NEPHRIN and NEPH1 are novel receptor proteins for hepatocyte growth factor (HGF) and can be phosphorylated independently of the mesenchymal epithelial transition receptor in a ligand-dependent fashion through engagement of their extracellular domains by HGF. Furthermore, we demonstrate SH2 domain–containing protein tyrosine phosphatase-2–dependent dephosphorylation of these proteins. To establish HGF as a ligand, purified baculovirus-expressed NEPHRIN and NEPH1 recombinant proteins were used in surface plasma resonance binding experiments. We report high-affinity interactions of NEPHRIN and NEPH1 with HGF, although NEPHRIN binding was 20-fold higher than that of NEPH1. In addition, using molecular modeling we constructed peptides that were used to map specific HGF-binding regions in the extracellular domains of NEPHRIN and NEPH1. Finally, using an in vitro model of cultured podocytes and an ex vivo model of Drosophila nephrocytes, as well as chemically induced injury models, we demonstrated that HGF-induced phosphorylation of NEPHRIN and NEPH1 is centrally involved in podocyte repair. Taken together, this is the first study demonstrating a receptor-based function for NEPHRIN and NEPH1. This has important biological and clinical implications for the repair of injured podocytes and the maintenance of podocyte integrity.
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Affiliation(s)
- Ashish K Solanki
- Department of Medicine, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Ehtesham Arif
- Department of Medicine, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Pankaj Srivastava
- Department of Biochemistry and Molecular Genetics, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Christopher M Furcht
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Bushra Rahman
- Department of Medicine, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Pei Wen
- Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Avinash Singh
- Department of Medicine, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Lawrence B Holzman
- Department of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Wayne R Fitzgibbon
- Department of Medicine, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Milos N Budisavljevic
- Department of Medicine, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Glenn P Lobo
- Department of Medicine, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Sang-Ho Kwon
- Department of Cellular Biology and Anatomy, Augusta University, Augusta, Georgia, USA
| | - Zhe Han
- Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Matthew J Lazzara
- Department of Chemical Engineering, University of Virginia, Charlottesville, Virginia, USA
| | - Joshua H Lipschutz
- Department of Medicine, Medical University of South Carolina, Charleston, South Carolina, USA; Department of Medicine, Ralph H. Johnson Veterans Affairs Medical Center, Charleston, South Carolina, USA.
| | - Deepak Nihalani
- Division of Kidney, Urologic and Hematologic Diseases, National Institutes of Health, Bethesda, Maryland, USA
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18
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Wang L, Wen P, van de Leemput J, Zhao Z, Han Z. Slit diaphragm maintenance requires dynamic clathrin-mediated endocytosis facilitated by AP-2, Lap, Aux and Hsc70-4 in nephrocytes. Cell Biosci 2021; 11:83. [PMID: 33975644 PMCID: PMC8111712 DOI: 10.1186/s13578-021-00595-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Accepted: 04/29/2021] [Indexed: 11/10/2022] Open
Abstract
Background The Slit diaphragm (SD) is the key filtration structure in human glomerular kidney that is affected in many types of renal diseases. SD proteins are known to undergo endocytosis and recycling to maintain the integrity of the filtration structure. However, the key components of this pathway remain unclear. Methods Using the Drosophila nephrocyte as a genetic screen platform, we screened most genes involved in endocytosis and cell trafficking, and identified the key components of the cell trafficking pathway required for SD protein endocytosis and recycling. Results We discovered that the SD protein endocytosis and recycling pathway contains clathrin, dynamin, AP-2 complex, like-AP180 (Lap), auxilin and Hsc70-4 (the endocytosis part) followed by Rab11 and the exocyst complex (the recycling part). Disrupting any component in this pathway led to disrupted SD on the cell surface and intracellular accumulation of mislocalized SD proteins. We also showed the first in vivo evidence of trapped SD proteins in clathrin-coated pits at the plasma membrane when this pathway is disrupted. Conclusions All genes in this SD protein endocytosis and recycling pathway, as well as SD proteins themselves, are highly conserved from flies to humans. Thus, our results suggest that the SD proteins in human kidney undergo the same endocytosis and recycling pathway to maintain the filtration structure, and mutations in any genes in this pathway could lead to abnormal SD and renal diseases. Supplementary Information The online version contains supplementary material available at 10.1186/s13578-021-00595-4.
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Affiliation(s)
- Luyao Wang
- Department of Nephrology, The First Affiliated Hospital of Zhengzhou University, No. 1 Jianshe Eastern Road, Zhengzhou, 450052, Henan, China.,Center for Precision Disease Modeling, Department of Medicine, University of Maryland School of Medicine, 670 West Baltimore Street, Baltimore, MD, 21201, USA.,Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, 21201, USA
| | - Pei Wen
- Center for Precision Disease Modeling, Department of Medicine, University of Maryland School of Medicine, 670 West Baltimore Street, Baltimore, MD, 21201, USA.,Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, 21201, USA
| | - Joyce van de Leemput
- Center for Precision Disease Modeling, Department of Medicine, University of Maryland School of Medicine, 670 West Baltimore Street, Baltimore, MD, 21201, USA.,Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, 21201, USA
| | - Zhanzheng Zhao
- Department of Nephrology, The First Affiliated Hospital of Zhengzhou University, No. 1 Jianshe Eastern Road, Zhengzhou, 450052, Henan, China.
| | - Zhe Han
- Center for Precision Disease Modeling, Department of Medicine, University of Maryland School of Medicine, 670 West Baltimore Street, Baltimore, MD, 21201, USA. .,Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, 21201, USA.
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19
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Wen P, Zhang W, Wang P, Zhang Y, Zhang W, Zhao Y, Guo H. Osteogenic effects of the peptide fraction derived from pepsin-hydrolyzed bovine lactoferrin. J Dairy Sci 2021; 104:3853-3862. [PMID: 33551166 DOI: 10.3168/jds.2020-19138] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Accepted: 11/04/2020] [Indexed: 11/19/2022]
Abstract
Osteoporosis is a common disease that frequently occurs in the older population, particularly in postmenopausal women. It severely compromises the health of the older population, and the drugs commonly used to treat osteoporosis have a variety of adverse effects. Lactoferrin (LF) is a protein present in milk that has recently been found to exhibit osteogenic activity. Lactoferrin is nontoxic and harmless, suggesting that it may have excellent biocompatibility and tolerability after human consumption. Oral consumption of LF in an ovariectomized rat model has been found to ameliorate osteoporosis. However, the mechanism underlying this effect remains to be clarified. In this study, bovine LF (bLF) was first hydrolyzed by pepsin for 1 h, and the hydrolyzed mixture was freeze-dried and collected. The hydrolyzed mixture was then separated into 5 components (E1-E5), of which E3 had the greatest effect in promoting proliferation of osteoblasts (MC3T3-E1). Component E3 was further isolated into 21 components with preparative reversed phase HPLC, and the E3-15 component had maximal bioactivity. With HPLC-mass spectrometry and peptide sequencing, E3-15 was identified to contain amino acids 97 to 208 from the bLF N terminus. Then, E3-15 was divided into 6 different peptide segments (P1-P6), and the corresponding segments were generated by solid-phase synthesis. Only the P1 peptide (amino acids 97-122 from the N terminus of bLF) significantly promoted osteoblast proliferation. The bioactivity of P1 toward osteoblast cells and alkaline phosphatase activity were tested as a function of P1 concentration, and a nonlinear effect was observed.
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Affiliation(s)
- P Wen
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou 730070, China
| | - W Zhang
- Beijing Laboratory of Food Quality and Safety, Key Laboratory of Functional Dairy, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - P Wang
- Beijing Laboratory of Food Quality and Safety, Key Laboratory of Functional Dairy, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Y Zhang
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou 730070, China
| | - W Zhang
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou 730070, China
| | - Y Zhao
- Department of Grain Science and Industry, Kansas State University, Manhattan 66506.
| | - H Guo
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou 730070, China; Beijing Laboratory of Food Quality and Safety, Key Laboratory of Functional Dairy, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China.
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20
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Deng H, Yang L, Wen P, Lei H, Blount P, Pan D. Spectrin couples cell shape, cortical tension, and Hippo signaling in retinal epithelial morphogenesis. J Cell Biol 2020; 219:133846. [PMID: 32328630 PMCID: PMC7147103 DOI: 10.1083/jcb.201907018] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 11/26/2019] [Accepted: 01/17/2020] [Indexed: 01/05/2023] Open
Abstract
Although extracellular force has a profound effect on cell shape, cytoskeleton tension, and cell proliferation through the Hippo signaling effector Yki/YAP/TAZ, how intracellular force regulates these processes remains poorly understood. Here, we report an essential role for spectrin in specifying cell shape by transmitting intracellular actomyosin force to cell membrane. While activation of myosin II in Drosophila melanogaster pupal retina leads to increased cortical tension, apical constriction, and Yki-mediated hyperplasia, spectrin mutant cells, despite showing myosin II activation and Yki-mediated hyperplasia, paradoxically display decreased cortical tension and expanded apical area. Mechanistically, we show that spectrin is required for tethering cortical F-actin to cell membrane domains outside the adherens junctions (AJs). Thus, in the absence of spectrin, the weakened attachment of cortical F-actin to plasma membrane results in a failure to transmit actomyosin force to cell membrane, causing an expansion of apical surfaces. These results uncover an essential mechanism that couples cell shape, cortical tension, and Hippo signaling and highlight the importance of non–AJ membrane domains in dictating cell shape in tissue morphogenesis.
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Affiliation(s)
- Hua Deng
- Department of Physiology, Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas, TX
| | - Limin Yang
- Department of Physiology, University of Texas Southwestern Medical Center, Dallas, TX
| | - Pei Wen
- Department of Physiology, Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas, TX
| | - Huiyan Lei
- Department of Physiology, Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas, TX
| | - Paul Blount
- Department of Physiology, University of Texas Southwestern Medical Center, Dallas, TX
| | - Duojia Pan
- Department of Physiology, Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas, TX
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21
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Shen J, Lu Z, Wang JQ, Lan S, Zhang F, Hirata A, Chen MW, Wang XL, Wen P, Sun YH, Bai HY, Wang WH. Metallic Glacial Glass Formation by a First-Order Liquid-Liquid Transition. J Phys Chem Lett 2020; 11:6718-6723. [PMID: 32649204 DOI: 10.1021/acs.jpclett.0c01789] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The glacial phase, with an apparently glassy structure, can be formed by a first-order transition in some molecular-glass-forming supercooled liquids. Here we report the formation of metallic glacial glass (MGG) from the precursor of a rare-earth-element-based metallic glass via the first-order phase transition in its supercooled liquid. The excellent glass-forming ability of the precursor ensures the MGG to be successfully fabricated into bulk samples (with a minimal critical diameter exceeding 3 mm). Distinct enthalpy, structure, and property changes are detected between MGG and metallic glass, and the reversed "melting-like" transition from the glacial phase to the supercooled liquid is observed in fast differential scanning calorimetry. The kinetics of MGG formation is reflected by a continuous heating transformation diagram, with the phase transition pathways measured at different heating rates taken into account. The finding supports the scenario of liquid-liquid transition in metallic-glass-forming liquids.
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Affiliation(s)
- J Shen
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Z Lu
- Mathematics for Advanced Materials - Open Innovation Laboratory (MathAM-OIL), AIST, Sendai 980-8577, Japan
| | - J Q Wang
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
| | - S Lan
- Herbert Gleiter Institute of Nanoscience, Nanjing University of Science and Technology, Nanjing 210094, China
- Department of Physics and Materials Science, City University of Hong Kong, Hong Kong, China
| | - F Zhang
- WPI- Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, Sendai 980-8577, Japan
| | - A Hirata
- WPI- Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, Sendai 980-8577, Japan
| | - M W Chen
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - X L Wang
- Department of Physics and Materials Science, City University of Hong Kong, Hong Kong, China
- City University of Hong Kong Shenzhen Research Institute, Shenzhen 518057, China
- Center for Advanced Structural Materials, City University of Hong Kong, Hong Kong China
| | - P Wen
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Y H Sun
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
| | - H Y Bai
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - W H Wang
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
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22
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Li J, Han Q, Liu R, Wen P, Ji W, Pan L, Wang C, Zhao P, Liu H, Bao J. Effects of environment and breed on growth performance and meat quality of fattening pigs. Anim Welf 2020. [DOI: 10.7120/09627286.29.2.177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Meat quality is not only influenced by breed but also rearing environment. The aim of this study was to evaluate the influence of different housing environments on growth performance, carcase traits, meat quality, physiological response pre-slaughter and fatty acid composition in two
pig breeds. A total of 120 growing pigs at 60–70 days of age were arranged in a 2 × 2 factorial design with the breeds (Duroc × Landrace × Large White [D × L × LW] and Duroc × Landrace × Min pig [D × L × M]) and environmental enrichment
(barren concrete floor or enriched with straw bedding) as factors. Each treatment was performed in triplicate with ten pigs per replicate. The pigs housed in the enriched environment exhibited a higher average daily gain, average daily feed intake, saturated fatty acid percentage and backfat
depth than the pigs reared in the barren environment. Plasma cortisol levels were lower and growth hormone higher in enriched compared to barren pens. The D × L × M pigs showed lower cooking loss compared with the D × L × LW pigs. Moreover, the D × L × M
pigs exhibited poor growth performance but had a better water-holding capacity. Only carcase traits and meat quality interaction effects were observed. We concluded that an enriched environment can reduce pre- slaughter stress and improve the growth performance of pigs and modulate the fatty
acid composition of pork products.
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23
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Wen P, Zhang F, Fu Y, Zhu JY, Han Z. Exocyst Genes Are Essential for Recycling Membrane Proteins and Maintaining Slit Diaphragm in Drosophila Nephrocytes. J Am Soc Nephrol 2020; 31:1024-1034. [PMID: 32238475 DOI: 10.1681/asn.2019060591] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Accepted: 02/17/2020] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND Studies have linked mutations in genes encoding the eight-protein exocyst protein complex to kidney disease, but the underlying mechanism is unclear. Because Drosophila nephrocytes share molecular and structural features with mammalian podocytes, they provide an efficient model for studying this issue. METHODS We silenced genes encoding exocyst complex proteins specifically in Drosophila nephrocytes and studied the effects on protein reabsorption by lacuna channels and filtration by the slit diaphragm. We performed nephrocyte functional assays, carried out super-resolution confocal microscopy of slit diaphragm proteins, and used transmission electron microscopy to analyze ultrastructural changes. We also examined the colocalization of slit diaphragm proteins with exocyst protein Sec15 and with endocytosis and recycling regulators Rab5, Rab7, and Rab11. RESULTS Silencing exocyst genes in nephrocytes led to profound changes in structure and function. Abolition of cellular accumulation of hemolymph proteins with dramatically reduced lacuna channel membrane invaginations offered a strong indication of reabsorption defects. Moreover, the slit diaphragm's highly organized surface structure-essential for filtration-was disrupted, and key proteins were mislocalized. Ultrastructural analysis revealed that exocyst gene silencing led to the striking appearance of novel electron-dense structures that we named "exocyst rods," which likely represent accumulated membrane proteins following defective exocytosis or recycling. The slit diaphragm proteins partially colocalized with Sec15, Rab5, and Rab11. CONCLUSIONS Our findings suggest that the slit diaphragm of Drosophila nephrocytes requires balanced endocytosis and recycling to maintain its structural integrity and that impairment of the exocyst complex leads to disruption of the slit diaphragm and nephrocyte malfunction. This model may help identify therapeutic targets for treating kidney diseases featuring molecular defects in vesicle endocytosis, exocytosis, and recycling.
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Affiliation(s)
- Pei Wen
- Center for Precision Disease Modeling, Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland.,Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland
| | - Fujian Zhang
- Center for Precision Disease Modeling, Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland
| | - Yulong Fu
- Center for Precision Disease Modeling, Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland
| | - Jun-Yi Zhu
- Center for Precision Disease Modeling, Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland.,Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland
| | - Zhe Han
- Center for Precision Disease Modeling, Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland .,Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland
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24
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Cappa F, Cini A, Pepiciello I, Petrocelli I, Inghilesi AF, Anfora G, Dani FR, Bortolotti L, Wen P, Cervo R. Female volatiles as sex attractants in the invasive population of Vespa velutina nigrithorax. J Insect Physiol 2019; 119:103952. [PMID: 31568763 DOI: 10.1016/j.jinsphys.2019.103952] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 09/18/2019] [Accepted: 09/26/2019] [Indexed: 06/10/2023]
Abstract
Due to its huge invasion potential and specialization in honeybee predation, the invasive hornet Vespa velutina nigrithorax represents a high-concern species under both an ecological and economical perspective. In light of the development of specific odorant attractants to be used in sustainable control strategies, we carried out both behavioural assays and chemical analyses to investigate the possibility that, in the invasive population of V. velutina nigrithorax, reproductive females emit volatile pheromones to attract males, as demonstrated in a Chinese non-invasive population. We focused on the secretions produced by sternal and venom glands; because of the volatility and complexity of their composition, both of them could potentially allow an attraction and a species-specific response, decreasing therefore non-target species by-catches. Results of chemical analyses and behavioural assays showed that venom volatiles, although population-specific, are unlikely candidates as male attractants since they do not differ in composition or in quantity between reproductive females and workers and do not attract males. Conversely, sternal gland secretion differs between female castes for the presence of some ketoacids exclusive of gynes already reported as sex pheromones for the non-invasive subspecies V. velutina auraria. Despite such a difference, males are attracted by the sternal gland secretion of both workers and gynes. These results provide a first step to understand the reproductive biology of V. velutina nigrithorax in its invasive range and to develop effective and sustainable management strategies for the species.
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Affiliation(s)
- Federico Cappa
- Dipartimento di Biologia, Università di Firenze, Via Madonna del Piano, 50019 Sesto F.no (Firenze), Italy.
| | - A Cini
- Dipartimento di Biologia, Università di Firenze, Via Madonna del Piano, 50019 Sesto F.no (Firenze), Italy; Centre for Biodiversity and Environment Research, University College London, Gower Street, London WC1E 6BT, UK
| | - I Pepiciello
- Dipartimento di Biologia, Università di Firenze, Via Madonna del Piano, 50019 Sesto F.no (Firenze), Italy
| | - I Petrocelli
- Dipartimento di Biologia, Università di Firenze, Via Madonna del Piano, 50019 Sesto F.no (Firenze), Italy
| | - A F Inghilesi
- Dipartimento di Biologia, Università di Firenze, Via Madonna del Piano, 50019 Sesto F.no (Firenze), Italy
| | - G Anfora
- Center Agriculture Food Environment (C3A), Università di Trento, Via E. Mach 1, 38010 San Michele a/A, Trento, Italy; Research and Innovation Centre, Fondazione Edmund Mach, Via E. Mach 1, 38010 San Michele a/A, Trento, Italy
| | - F R Dani
- Dipartimento di Biologia, Università di Firenze, Via Madonna del Piano, 50019 Sesto F.no (Firenze), Italy
| | - L Bortolotti
- CREA - Centro di ricerca Agricoltura e Ambiente, Unità di ricerca di apicoltura e bachicoltura (API), Via di Saliceto 80, 40128 Bologna, Italy
| | - P Wen
- Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Science, Qinsong Road 21, Panlong, Kunming, Yunnan 650223, China
| | - R Cervo
- Dipartimento di Biologia, Università di Firenze, Via Madonna del Piano, 50019 Sesto F.no (Firenze), Italy
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Tabrizi S, Rahman R, Cagney D, Aizer A, Tanguturi S, Arvold N, Reardon D, Lee E, Nayak L, Rinne M, Ligon K, Wen P, Alexander B. Impact of Delay in Initiation of Radiation Therapy in Newly Diagnosed Glioblastoma Patients after Gross Total Resection. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.2314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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26
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Zhao Y, Wang N, Wen P, Ouyang WB, Zhang FW, Qiu X, Liu Y, Zhao GZ, Xie YQ, Pan XB. [Safety and efficacy of percutaneous intervention for children with combined congenital heart abnormality solely guided by transthoracic echocardiography]. ZHONGHUA XIN XUE GUAN BING ZA ZHI 2018; 46:804-809. [PMID: 30369172 DOI: 10.3760/cma.j.issn.0253-3758.2018.10.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the safety and efficacy of percutaneous intervention of children with combined congenital heart abnormality solely guided by transthoracic echocardiography (TTE) . Methods: From September 2015 to June 2017, 21 children with combined congenital heart abnormality undergoing percutaneous interventional guided by TTE in Fuwai hospital were enrolled in our study, and the clinical data were retrospective analyzed. The atrial septal defect(ASD) closure, ventricular septal defect(VSD) closure, patent ductus arteriosus(PDA) closure or balloon pulmonary valvuloplasty were performed under the guidance of TTE. The procedural effect was evaluated by TTE after operation. The patients were followed up after discharged from the hospital. Results: The age was (37.3±11.6) months, and there were 9 male and 12 female patients. There were 4 cases with ASD and VSD, 6 cases with VSD and PDA, 6 cases with ASD and PDA, 2 cases with VSD and pulmonary stenosis, 3 cases with ASD and pulmonary stenosis. The operations were successfully performed in all patients. No one required extra X ray guidance or open heart surgery. The operation time was (44.6±7.5)min. All patients did not require blood transfusion, inotropic support, and analgesia. There were no complications such as peripheral vascular injury and pericardialeffusion after the operation. The length of hospital stay time was (3.5±0.6) days. All patients were recovered well. The follow-up was (17.6±5.2) months, and post-procedural conduction disturbances, residual shunts, occlude fall off, thrombosis, and new onset of valvular regurgitation were not observed in these patients. Conclusion: Percutaneous interventional of children with combined congenital heart abnormality solely guided by TTE is safe and effective, and the procedure can avoid the potential injuries of X ray and contrast agent.
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Affiliation(s)
- Y Zhao
- Department of Cardiothoracic Surgery, Dalian Children's Hospital, Dalian 116012, China
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27
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Dewan AK, Sowerby L, Jadeja S, Lian C, Wen P, Brown JR, Fisher DC, LeBoeuf NR. Pityriasis rubra pilaris-like erythroderma secondary to phosphoinositide 3-kinase inhibition. Clin Exp Dermatol 2018; 43:890-894. [PMID: 29851132 DOI: 10.1111/ced.13608] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/31/2017] [Indexed: 12/20/2022]
Abstract
BACKGROUND Phosphoinositide 3-kinase (PI3K) inhibitors are a class of small-molecule inhibitors approved for the treatment of certain leukaemias and lymphomas. Their dermatological adverse event profile is poorly described. AIM To characterize a rare cutaneous adverse event from PI3K inhibitors in order to help dermatologists and oncologists identify and effectively manage such eruptions. METHODS This was a retrospective analysis of patients receiving PI3K inhibitors referred to the Skin Toxicities Program in The Center for Cutaneous Oncology. RESULTS Three patients on PI3K inhibitors for treatment of malignancy developed diffuse erythroderma and keratoderma. Clinical and histopathological findings were consistent with pityriasis rubra pilaris (PRP)-like reactions. All patients improved with topical and oral corticosteroids, oral acitretin, and drug discontinuation. CONCLUSIONS PRP-like cutaneous eruptions may develop secondary to PI3K inhibition. Early dermatological evaluation of cutaneous toxicities to PI3K inhibitors as well as rapid initiation of disease-specific treatments may help keep patients on life-prolonging anti-cancer therapies.
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Affiliation(s)
- A K Dewan
- Department of Dermatology, The Center for Cutaneous Oncology, Dana-Farber Cancer Institute and Brigham and Women's Hospital, Boston, MA, USA
| | - L Sowerby
- Department of Dermatology, The Center for Cutaneous Oncology, Dana-Farber Cancer Institute and Brigham and Women's Hospital, Boston, MA, USA
| | - S Jadeja
- Department of Pathology, Brigham and Women's Hospital, Boston, MA, USA
| | - C Lian
- Department of Pathology, Brigham and Women's Hospital, Boston, MA, USA
| | - P Wen
- Department of Neuro-Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - J R Brown
- Chronic Lymphocytic Leukemia Center and Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - D C Fisher
- Division of Hematologic Malignancies and Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - N R LeBoeuf
- Department of Dermatology, The Center for Cutaneous Oncology, Dana-Farber Cancer Institute and Brigham and Women's Hospital, Boston, MA, USA
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Yan K, Zhao S, Cui M, Han G, Wen P. Vulnerability of photosynthesis and photosystem I in Jerusalem artichoke (Helianthus tuberosus L.) exposed to waterlogging. Plant Physiol Biochem 2018; 125:239-246. [PMID: 29477087 DOI: 10.1016/j.plaphy.2018.02.017] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2017] [Revised: 02/13/2018] [Accepted: 02/13/2018] [Indexed: 05/25/2023]
Abstract
Jerusalem artichoke (Helianthus tuberosus L.) is an important energy crop for utilizing coastal marginal land. This study was to investigate waterlogging tolerance of Jerusalem artichoke through photosynthetic diagnose with emphasis on photosystem II (PSII) and photosystem I (PSI) performance. Potted plants were subjected to severe (liquid level 5 cm above vermiculite surface) and moderate (liquid level 5 cm below vermiculite surface) waterlogging for 9 days. Large decreased photosynthetic rate suggested photosynthesis vulnerability upon waterlogging. After 7 days of severe waterlogging, PSII and PSI photoinhibition arose, indicated by significant decrease in the maximal photochemical efficiency of PSII (Fv/Fm) and PSI (△MR/MR0), and PSI seemed more vulnerable because of greater decrease in △MR/MR0 than Fv/Fm. In line with decreased △MR/MR0 and unchanged Fv/Fm after 9 days of moderate waterlogging, the amount of PSI reaction center protein rather than PSII reaction center protein was lowered, confirming greater PSI vulnerability. According to positive correlation between △MR/MR0 and efficiency that an electron moves beyond primary quinone and negative correlation between △MR/MR0 and PSII excitation pressure, PSI inactivation elevated PSII excitation pressure by depressing electron transport at PSII acceptor side. Thus, PSI vulnerability induced PSII photoinhibition and endangered the stability of whole photosynthetic apparatus under waterlogging. In agreement with photosystems photoinhibition, elevated H2O2 concentration and lipid peroxidation in the leaves corroborated waterlogging-induced oxidative stress. In conclusion, Jerusalem artichoke is a waterlogging sensitive species in terms of photosynthesis and PSI vulnerability. Consistently, tuber yield was tremendously reduced by waterlogging, confirming waterlogging sensitivity of Jerusalem artichoke.
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Affiliation(s)
- Kun Yan
- Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, China.
| | - Shijie Zhao
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, China
| | - Mingxing Cui
- Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, China
| | - Guangxuan Han
- Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, China.
| | - Pei Wen
- Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, China
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Ding D, Zhao F, Huang YL, Li XL, Gong F, Yao ZC, Zhang BW, Yang ZY, Ma JM, Shen J, Wen P. [Effects of sural nerve nutrition vess els-supported flap for reconstruction of distal lower leg and ankle soft tissue defects]. Zhonghua Yi Xue Za Zhi 2018; 98:842-845. [PMID: 29609267 DOI: 10.3760/cma.j.issn.0376-2491.2018.11.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To observe the effects of sural nerve nutrition vessels-supported flap for reconstruction of distal lower leg and ankle soft tissue defects. Methods: From June 2014 to June 2017, 37 patients with calf distal and ankle soft tissue defect were repaired with sural nerve nutrition vessels-supported flap, of them 12 cases with calf distal soft tissue defect wounds and 25 cases with ankle soft tissue defect wounds.The scope of flaps was 9 cm×4 cm to 18 cm×9 cm, anti-infection, anti-freezing and dressing treatments were carried out after operation.The results of two-point discrimination among reexamination were recorded. Results: All the flaps survived without ulcer and effusion, only 1 flap for reconstruction of medial malleolus swelled and deactivated at the beginning while it recovered with proper dressings.During the follow-up periods, all the flaps kept favorable feelings, aspects and functions, and the two-point discrimination was 5 to 15 mm [averaged (11.2±1.7) mm]. Conclusion: Sural nerve nutrition vessels-supported flap brings significant effects with excellent safety and reliability in repairing calf and ankle soft tissue defects.
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Affiliation(s)
- D Ding
- Department of Hand and Foot Microsurgery for Reconstruction, the First Affiliated Hospital of Northwest University for Nationalities (the Affiliated Ningxia Peoples Hospital of Ningxia Medical University), Yinchuan 750003, China
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Shi D, Arvold N, Aizer A, Norden A, Reardon D, Lee E, Nayak L, Dunn I, Golby A, Johnson M, Claus E, Chiocca A, Ligon K, Wen P, Alexander B. Salvage Re-Irradiation for Recurrent High-Grade Glioma and Comparison to Bevacizumab Alone. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Nandu H, Kijewski MF, Dubey S, Belanger AP, Reardon D, Wen P, Kesari S, Horky L, Park M, Huang RY. P09.13 F-18 FLT PET and MRI as outcome predictors in glioblastomas following chemoradiation therapy. Neuro Oncol 2017. [DOI: 10.1093/neuonc/nox036.271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Zhou Y, Zhou M, Liao H, Rowland B, Arvold N, Reardon D, Wen P, Lin A, Huang RY. OS04.7 Diagnostic Accuracy of 2-Hydroxyglutarate Magnetic Resonance Spectroscopy in Newly Diagnosed Brain Mass and Suspected Recurrent Glioma. Neuro Oncol 2017. [DOI: 10.1093/neuonc/nox036.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Mehta M, Wen P, Nishikawa R, Reardon D, Peters K. Critical review of the addition of tumor treating fields (TTFields) to the existing standard of care for newly diagnosed glioblastoma patients. Crit Rev Oncol Hematol 2017; 111:60-65. [PMID: 28259296 DOI: 10.1016/j.critrevonc.2017.01.005] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Revised: 12/13/2016] [Accepted: 01/10/2017] [Indexed: 11/17/2022] Open
Abstract
Since 2005, the standard of care for patients with newly diagnosed glioblastoma (GBM) has consisted of maximal resection followed by radiotherapy plus daily temozolomide (TMZ), followed by maintenance TMZ. In patients selected for clinical trials, median overall survival (OS) and progression-free survival (PFS) with this regimen is 15-17 months and 6-7 months, respectively. There have been various, largely unsuccessful attempts to improve on this standard of care. With the FDA approval of the tumor-treating fields (TTFields) device, Optune, for recurrent GBM (2011), and the more recent EF-14 interim trial results and approval for newly diagnosed GBM patients, several questions have arisen. A roundtable of experts was convened at the 2015 ASCO meeting to engage in an open conversation and debate of the EF-14 results presented at that meeting and their implications for neuro-oncology practice and clinical research. In October 2015, subsequent to the roundtable discussion, TTFields received FDA approval for newly diagnosed GBM.
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Affiliation(s)
- M Mehta
- Deputy Director, Miami Cancer Institute, and Chief of Radiation Oncology, Miami, Florida.
| | - P Wen
- Department of Neurology, Harvard University, Center for Neuro-Oncology, Dana-Farber Cancer Institute, Boston, MA
| | - R Nishikawa
- Japanese Society of Neuro-Oncology, Department of Neurosurgery, Saitama International Medical Center and University, Saitama, Japan
| | - D Reardon
- Center for Neuro-Oncology, Harvard Medical School, Boston, MA, United States
| | - K Peters
- Medicine, Duke University Medical Center, Durham, NC, United States
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Abstract
We explore the correlation between a boson peak and structural relaxation in a typical metallic glass. Consistent with enthalpy recovery, a boson peak shows a memory effect in an aging-and-scan procedure. Single-step isothermal aging produces a monotonic decrease of enthalpy and boson peak intensity; for double-step isothermal aging, both enthalpy and boson peak intensity experience, coincidently, an incipient increase to a maximum and a subsequent decrease toward the equilibrium state. Our results indicate a direct link between slow structural relaxation and fast boson peak dynamics, which presents a profound understanding of the two dynamic behaviors in glass.
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Affiliation(s)
- P Luo
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
| | - Y Z Li
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
| | - H Y Bai
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
| | - P Wen
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
| | - W H Wang
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
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Wang GL, Liu Y, Qiu P, Zhou SF, Xu LF, Wen P, Wen JB, Xiao XZ. Cost-effectiveness of Lamivudine, Telbivudine, Adefovir Dipivoxil and Entecavir on decompensated hepatitis B virus-related cirrhosis. Eur Rev Med Pharmacol Sci 2016; 20:866-872. [PMID: 27010143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
OBJECTIVE To evaluate the cost-effectiveness of lamivudine (LMV), telbivudine (LdT), adefovir dipivoxil (ADV) and entecavir (ETV) on decompensated hepatitis B virus-related cirrhosis. PATIENTS AND METHODS 1332 patients with decompensated hepatitis B virus-related cirrhosis were randomly assigned into 5 groups with different clinical treatment including LMV treatment, LdT treatment, ADV treatment, LMV+ADV treatment and ETV treatment. And then the liver function, Child-Pugh scores, sero-conversion of HBeAg/HBeAb, polymerase gene mutations, cost-effectiveness, incremental cost-effectiveness and side effects were investigated and further analyzed. RESULTS LMV, ADV, LdT, LMV+ADV and ETV were all effective on decreasing Child-Pugh scores and conversing negatively hepatitis B virus (HBV) DNA and HBeAg, whereas LMV+ADV and ETV more effective than LMV, ADV and LdT. HBV DNA polymerase genotypic mutations were rare in the 5 groups. The less mutation rate was found in the LMV+ADV and ETV group than in the LMV, ADV and LdT group. Compared to the cost-effectiveness and incremental cost-effectiveness ratio, ETV was the optimal selection, LMV+ADV was the alternative selection and LMV was the cheapest option. The side effects of the 5 plans were all rare and could be controlled. CONCLUSIONS LMV, ADV, LdT, LMV+ADV and ETV were all effective on treatment of decompensated hepatitis B virus-related cirrhosis whereas ETV and LMV+ADV were recommended.
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Affiliation(s)
- G-L Wang
- Department of Digestive Internal Medicine, 307 Hospital of PLA, Beijing, People's Republic of China.
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Wang TS, Lei W, Cui W, Wen P, Guo HF, Ding SG, Yang YP, Xu YQ, Lv SW, Zhu YL. A meta-analysis of bevacizumab combined with chemotherapy in the treatment of ovarian cancer. Indian J Cancer 2015; 51 Suppl 3:e95-8. [PMID: 25818743 DOI: 10.4103/0019-509x.154084] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
INTRODUCTION Angiogenesis plays an important role in the biology of ovarian cancer. The clinical efficacy and side effects of bevacizumab, the vascular endothelial growth factor inhibitor, on survival and toxicity in women with this ovarian cancer, was not conclusive. We performed this systematic review and meta-analysis in order to clarify the efficacy of bevacizumab combined with chemotherapy in the treatment of ovarian cancer. MATERIALS AND METHODS We searched the electronic database of MEDLINE, EMBASE, Cochrane Central Register of Controlled Trials and CNKI for clinical controlled trials of comparing bevacizumab combined with chemotherapy and chemotherapy alone in the treatment of ovarian cancer. The primary outcomes of eligible studies included median progression-free survival (PFS), overall survival (OS), and toxicities such as enterobrosis, hypertension, albuminuria, congestive heart failure (CHF), neutrophils, thrombosis, and bleeding. The Hazard ratio (HR) and relative risk were used for the meta-analysis and were expressed with 95% confidence intervals (CIs). All the statistical analyses were carried out by Stata 11.0 software (http://www.stata.com; Stata Corporation, College Station, TX, USA). RESULTS We included 5 studies with 1798 cases in the bevacizumab combined with the chemotherapy group and 1810 subjects in the chemotherapy alone group. The pooled results showed that bevacizumab + chemotherapy compared with chemotherapy alone can significant prolong the median PFS (HR, 0.64; 95% CI, 0.46-0.82; P < 0.05) but not the OS (HR, 0.84; 95% CI, 0.59-10.9; P > 0.05); the toxicity analysis showed that the enterobrosis, hypertension, albuminuria, neutrophils, thrombosis, and bleeding were significantly increased in the bevacizumab + chemotherapy group compared with chemotherapy alone (Pall < 0.05). But the CHF risk between the two groups was not statistical different (P > 0.05). CONCLUSION Bevacizumab combined with chemotherapy prolonged the median PFS in patients with ovarian cancer but also increase the risk of developing enterobrosis, hypertension, albuminuria, neutrophils, thrombosis, and bleeding.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Y L Zhu
- Department of Clinical Pharmacy, The Center Hospital of Jinhua City, Jinhua 321000, China
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Zhu ZG, Li YZ, Wang Z, Gao XQ, Wen P, Bai HY, Ngai KL, Wang WH. Compositional origin of unusual β-relaxation properties in La-Ni-Al metallic glasses. J Chem Phys 2015; 141:084506. [PMID: 25173020 DOI: 10.1063/1.4893954] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
The β-relaxation of metallic glasses (MGs) bears nontrivial connections to their microscopic and macroscopic properties. In an effort to elucidate the mechanism of the β-relaxation, we studied by dynamical mechanical measurements the change of its properties on varying the composition of La60Ni15Al25 in various ways. The properties of the β-relaxation turn out to be very sensitive to the composition. It is found that the isochronal loss peak temperature of β-relaxation, Tβ,peak, is effectively determined by the total (La + Ni) content. When Cu is added into the alloy to replace either La, Ni, or Al, the Tβ,peak increases with decrease of the (La + Ni) content. The trend is in accordance with data of binary and ternary MGs formed from La, Ni, Al, and Cu. Binary La-Ni MGs have pronounced β-relaxation loss peaks, well separated from the α-relaxation. In contrast, the β-relaxation is not resolved in La-Al and La-Cu MGs, showing up as an excess wing. For the ternary La-Ni-Al MGs, increase of La or Ni content is crucial to lower the Tβ,peak. Keeping the Al content fixed, increase of La content lowers the Tβ,peak further, indicating the more important role La plays in lowering Tβ,peak than Ni. The observed effects on changing the composition of La60Ni15Al25 lead to the conclusion that the properties of the β-relaxation are mainly determined by the interaction between the largest solvent element, La, and the smallest element, Ni. From our data, it is further deduced that La and Ni have high mobility in the MGs, and this explains why the β-relaxation in this La-based MGs is prominent and well resolved from the α-relaxation as opposed to Pd- and Zr-based MGs where the solvent and largest atoms, Pd and Zr, are the least mobile.
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Affiliation(s)
- Z G Zhu
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Y Z Li
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Z Wang
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - X Q Gao
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - P Wen
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - H Y Bai
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - K L Ngai
- Dipartimento di Fisica, Università di Pisa, Largo B. Pontecorvo 3, I-56127 Pisa, Italy
| | - W H Wang
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
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Ding R, Feng L, He L, Chen Y, Wen P, Fu Z, Lin C, Yang S, Deng X, Zeng J, Sun G. Peroxynitrite decomposition catalyst prevents matrix metalloproteinase-9 activation and neurovascular injury after hemoglobin injection into the caudate nucleus of rats. Neuroscience 2015; 297:182-93. [PMID: 25849612 DOI: 10.1016/j.neuroscience.2015.03.065] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2014] [Revised: 03/19/2015] [Accepted: 03/29/2015] [Indexed: 10/23/2022]
Abstract
Hemoglobin (Hb) is a major constituent of blood and a potent mediator of oxidative or nitrative stress after intracerebral hemorrhage (ICH). Our previous study demonstrated that Hb could induce abundant peroxynitrite (ONOO(-)) formation in vivo, which may be involved in the blood-brain barrier (BBB) disruption, however, the drug intervention is absent and also the underlying mechanism. Using an experimental stroke model by injecting Hb into the caudate nucleus of male Sprague-Dawley rats, we assessed the role of ONOO(-) decomposition catalyst, 5,10,15,20-tetrakis (4-sulfonatophenyl) porphyrinato iron(III) [FeTPPS] in the activation of MMP-9 and Hb-induced neurovascular injuries. 3-Nitrotyrosine (3-NT, as an index of ONOO(-) formation) and NF-κB expression was measured by western blot (WB) and immunohistochemistry (IHC)/immunofluorescence (IF). Activity of MMP was evaluated by in situ zymography. Neurovascular injury was assessed using zonula occludens-1 (ZO-1) by WB and IF, fibronectin (FN) and neuron-specific nuclear protein (NeuN) IHC. Perihematomal cell death was determined by TUNEL assay. Behavioral outcome was measured by modified neurological severity score (mNSS) test. At the injured striata, profuse 3-NT was produced and mainly expressed in neutrophils and microglia/macrophages. 3-NT formation significantly colocalized with nuclear factor-κB (NF-κB) expression. In situ zymography showed that gelatinase activity was mostly co-localized with neurons and blood vessel walls and partly with neutrophils and microglia/macrophages. Enhanced 3-NT production, NF-κB induction and MMP-9 activation were obviously reduced after FeTPPS treatment. Hb-induced injury to tight junction protein (ZO-1), basal lamina of FN-immunopositive microvasculature and neural cells was evidently ameliorated by FeTPPS. In addition, apoptotic cell numbers as well as behavioral deficits were also improved. The present study shows that the administration of the ONOO(-) decomposition catalyst FeTPPS protects against Hb-induced neurovascular injuries and improves neurological function, which possibly in part by suppressing MMP-9 activation.
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Affiliation(s)
- R Ding
- The National Key Clinic Specialty, The Neurosurgery Institute of Guangdong Province, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, China
| | - L Feng
- The National Key Clinic Specialty, The Neurosurgery Institute of Guangdong Province, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, China
| | - L He
- Department of Endocrinology, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, China
| | - Y Chen
- The National Key Clinic Specialty, The Neurosurgery Institute of Guangdong Province, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, China.
| | - P Wen
- The National Key Clinic Specialty, The Neurosurgery Institute of Guangdong Province, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, China
| | - Z Fu
- The National Key Clinic Specialty, The Neurosurgery Institute of Guangdong Province, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, China
| | - C Lin
- The National Key Clinic Specialty, The Neurosurgery Institute of Guangdong Province, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, China
| | - S Yang
- Department of Neurosurgery, Gaoqing Campus of Central Hospital of Zibo, Gaoqing People's Hospital, Gaoqing, Zibo 256300, Shandong, China
| | - X Deng
- Department of Neurosurgery, 999 Brain Hospital, Jinan University, Guangzhou 510510, China
| | - J Zeng
- The National Key Clinic Specialty, The Neurosurgery Institute of Guangdong Province, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, China
| | - G Sun
- Department of Organ Transplantation, Zhujiang Hospital, Southern Medical University, Guangzhou 510515, China
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Brenner A, Cohen Y, Vredenburgh J, Peters K, Blumenthal D, Bokstein F, Breitbart E, Bangio L, Sher N, Harats D, Wen P. NT-07 * PHASE 1-2 DOSE-ESCALATION STUDY OF VB-111, AN ANTI-ANGIOGENIC GENE THERAPY, AS MONOTHERAPY AND IN COMBINATION WITH BEVACIZUMAB, IN PATIENTS WITH RECURRENT GLIOBLASTOMA. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou265.7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Wen P, Reardon D, Phuphanich S, Aiken R, Landolfi J, Curry W, Zhu JJ, Glantz M, Peereboom D, Markert J, Larocca R, O'Rourke D, Fink K, Kim L, Gruber M, Lesser G, Pan E, Kesari S, Yu J. AT-60 * A RANDOMIZED DOUBLE BLIND PLACEBO-CONTROLLED PHASE 2 TRIAL OF DENDRITIC CELL (DC) VACCINE ICT-107 FOLLOWING STANDARD TREATMENT IN NEWLY DIAGNOSED PATIENTS WITH GBM. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou237.59] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Gilbert M, Yuan Y, Wani K, Wu J, Omuro A, Lieberman F, Robins HI, Gerstner E, Wu J, Wen P, Mikkelsen T, Armstrong T, Aldape K. AT-23 * A PHASE II STUDY OF LAPATINIB AND DOSE-DENSE TEMOZOLOMIDE (TMZ) FOR ADULTS WITH RECURRENT EPENDYMOMA: A CERN CLINICAL TRIAL. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou237.23] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Lee E, Muzikansky A, Kesari S, Wong E, Fadul C, Reardon D, Norden A, Nayak L, Rinne M, Alexander B, Arvold N, Doherty L, LaFrankie D, Pulverenti J, Smith K, Gaffey S, Kenney A, Hammond S, Drappatz J, Wen P. SM-03 * A RANDOMIZED, PLACEBO-CONTROLLED PILOT TRIAL OF ARMODAFINIL FOR FATIGUE IN PATIENTS WITH GLIOMAS UNDERGOING RADIOTHERAPY. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou277.3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Huang R, Rahman R, Pope W, Ellingson B, Ballman K, Felton S, Anderson SK, Nayak L, Lee E, Abrey L, Galanis E, Reardon D, Cloughesy T, Wen P. NI-36 * VALIDATION OF RANO CRITERIA: CONTRIBUTION OF T2/FLAIR ASSESSMENT IN PATIENTS WITH RECURRENT GLIOBLASTOMA TREATED WITH BEVACIZUMAB. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou264.34] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Armstrong TS, Vera-Bolanos E, Gilbert M, Yuan Y, Wani K, Wu J, Omuro A, Lieberman F, Robins HI, Gerstner E, Wu J, Wen P, Mikkelsen T, Aldape K, Mendoza T. AT-07 * A PHASE II STUDY OF LAPATINIB AND DOSE-DENSE TEMOZOLOMIDE (TMZ) FOR ADULTS WITH RECURRENT EPENDYMOMA: PATIENT REPORTED OUTCOMES (PRO) FROM A CERN CLINICAL TRIAL. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou237.7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Chandra V, Ou Y, Evans J, Kalpathy-Cramer J, Dietrich J, Chi A, Wen P, Rosen B, Batchelor T, Gerstner E. AT-16 * PHASE II STUDY OF TIVOZANIB, AN ORAL VEGFR INHIBITOR, IN PATIENTS WITH RECURRENT GLIOBLASTOMA. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou237.16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Gilbert M, Wen P, Schiff D, Aldape K. Highlights from the Literature. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Liu W, Ye H, Tang B, Song Z, Sun Z, Wen P, Yang J. Profile of interdialytic ambulatory blood pressure in a cohort of Chinese patients. J Hum Hypertens 2014; 28:677-83. [PMID: 24919753 DOI: 10.1038/jhh.2014.41] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Revised: 04/19/2014] [Accepted: 05/01/2014] [Indexed: 01/20/2023]
Abstract
Management of hypertension is one of the fundamental interventions in dialysis patients. However, the profile of interdialytic blood pressure (BP) in Chinese dialysis patients remains elusive. We aim to investigate this issue as well as the effect of antihypertensive medication in this population. We performed 44-h ambulatory BP in 90 patients on maintenance hemodialysis. Patients were classified as 'dipping', 'non-dipping' or 'reverse-dipping' based on night/day ratio (N/D) of systolic BP on nondialysis day. The prevalence of blunted circadian BP pattern was strikingly high (92.2%), with more than half of the patients (55.6%) classified as reverse-dipping. There was a close association between high erythropoietin (EPO) dose used and deteriorated circadian rhythm. Patients in the dipping group also displayed a dipping state for heart rate (HR) compared with the other two groups (N/D of HR: 81.5 ± 6.6 vs 92.1 ± 6.0 and 91.3 ± 10.7, P=0.02). Only 26.7% patients had a controlled nocturnal BP. Patients with bedtime dosing had lower N/D of systolic BP compared with patients without (100.1 ± 7.0 vs 105.2 ± 7.1, P=0.01). Non-dipping and reverse-dipping are highly prevalent in Chinese patients. EPO use and autonomic dysfunction may contribute to the blunted circadian rhythm. More tightly control of nighttime BP is an urgent need and bedtime dosing may be beneficial.
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Affiliation(s)
- W Liu
- Center for Kidney Disease, Second Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - H Ye
- Center for Kidney Disease, Second Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - B Tang
- Center for Kidney Disease, Second Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Z Song
- Center for Kidney Disease, Second Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Z Sun
- Center for Kidney Disease, Second Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - P Wen
- Center for Kidney Disease, Second Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - J Yang
- Center for Kidney Disease, Second Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
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Schiff D, Huse J, Wen P, Aldape K. Highlights from the Literature. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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